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Prev Professional Automotive Repair Technical Discussions for November 11, 2005
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Open Help Requests for GM
Help Request Answers
1996 Buick Roadmaster Estate Wagon Collector's Edition 5.7L No Start VIN: 1G4BR82P1T
I have this Buick that is giving me fits. It quit on the customer going down the road, he said it was just like he shut the key off. Brought it in check fuel pressure and spark has both sounded like it was out of time. Pulled plugs fuel soaked replaced them, s...
1988 Cadillac Seville 4.5L ac VIN: 1G6KS5155J
I hold in the auto and warm button on display and codes will not clear,checked all temp sensers and pressure switch.I've got the BCM out,just tring to make sure this is it,cause its probably going to be a used part or repaired.
1990 Cadillac Eldorado 4.5L MIL Lamp on VIN: 1G6EL133OL
at times on key up check eng lite on ,charge lite on, clicking from pass side dash display goes out. will do it running at times. Trouble codes: E047, B0334
1994 Chevrolet Camaro 3.4L No Start VIN: 2G1FP2259R
i'll get to the point. This camero is driving me nuts,it goes intoan extended crank after a hotsoak (no spark injectors are pulsing).It came in with a code 82 Ign ctrl 3x signal error.We pulled flowchart forthe code 82 the sensor warm was 1.119k ohms well with... Trouble codes: 82 (Ign.ctrl 3x signal error)
1994 Chevrolet K2500 Cheyenne 6.5L Cuts out VIN: 1GCEK29S5R
fuel solenoid driver is faulty. can anyone tell me if a spec exists for testing the fuel solenoid? not the shutoff solenoid. thank you.
1996 Chevrolet Blazer 4.3L Hesitation, Cuts out, excessive crank time VIN: 1GNDT13W3T
This vehicle is mainly in for excessive cranking time. In January the vehicle came in for a long crank, and rough idle and no power it was diagnosed and fixed by replacing fuel pump, than in September the vehicle was towed in for a no start, there was no fuel ...
1998 Chevrolet Astro 4.3L No Start VIN: 1GCDM19W5X
This van was towed in for a no start, engine cranks normally, but about every revolution fires violently through the intake. Came in with a crank sensor code, scoped signal, not very good, replaced, no change. Also checked crank circiuts per trouble chart. Fue... Trouble codes: P0337 (Crank Sensor Circuit Low Frequency)
2001 Chevrolet Silverado 3500 6.6L Cuts out, MIL Lamp on VIN: 1GCJK3918F
truck was brought in 3 weeks ago with poo93 trouble code stored in pcm.customer complaint was when pulling a trailer or under load engine has no power.stop truck turn off ignition restart truck & power was resumed but mil still on.i completed diagnostic chart ... Trouble codes: P0093
1997 Oldsmobile Silhouette GL 3.4L Hesitation, Cuts out VIN: 1GHDX03E5V
Hello Fellow Techs, Customer brought this van in with a hesitation only when cold. They left the vehicle overnight so I could duplicate the situation. Within the first few blocks of driving the vehicle stumble badly and seem to backfire through the intake und...
1988 Pontiac Firebird 2.8L Hesitation VIN: 1G2FS87S8G
I think this car had/has more than 1 issue.It came in a no start,it had alot of play in the timing chain so it was replaced.I got it running and all is fine except it will cough if you take of slow runs fine wot.if you dog it it will cough after a shift.This c...
1992 Pontiac Grand Am SE 3.3L abs VIN: 1G2NE14N9N
I'm pulling out my hair on this one.It seems to have all the power circuits up and grounds.Motor packs cycle when crank up.I cannot seem to find the reason for no comunication. I would appreciate any help.Robert
1999 Pontiac Grand Prix GT 3.8L Surge VIN: 1G2WP12K8X
This Grand Prix will surge, usually when driving up a incline and at around 2000 rpm. There are no codes and the TPS stays steady. You would suspect it to be the transmission except the symtoms are a surge not a shudder. The car drives fine and only has this s...

Fixes & Summaries for GM
Fix/Summary Answers
1992 Buick LeSabre Limited 3.8L abs & traction lights VIN: 1G4HR53L7N
i found 2 problems. first, there was still air in the modulator causing the inlet and outlet codes. i had to power up the pump motor to get all the air out. also,the code 61 would not clear until i replaced the pump relay with a new relay. during testing i bor...
1993 Buick Skylark Custom 3.3L interior lights VIN: 1G4NVQ4N8P
Customer decided to live w/ light staying on--noted lights will now go off within 15-20 minutes now after reinstalling old multifunction module. thanks for all the assistance.
1995 Buick LeSabre Custom 3.8L coolant temp VIN: 1G4HP52L9S
Well first off thanks for all the help. The problem was the ecm. There is a resistor inside the ecm that runs that circuit and that was intermitantly shorting out. Everyone was right that the coolant temp sensor even only two wire runs the light as well. Stran...
1997 Cadillac Eldorado 4.6L Accessories VIN: 1G6EL12Y4V
As the old saying goes K.I.S.S keep it simple stupid, Found that the customer was messing with the fuses and he left out the ign relay 1 fuse in the trunk, install fuse all is well thanks
1992 Chevrolet C1500 Cheyenne 5.7L No Start VIN: 2GTEC19K2N
Well, I think we fixed it. We got lots of help that pointed us to lots of things we had already tested or replaced. The one that got it right was Bernie from Michigan, We removed the dist holddown and actually got it on the grinder and removed the glaze. Put t...
1995 Chevrolet C3500 Cheyenne 6.5L No Start VIN: 1GBKC34F8S
We did a lot more testing and found that there was a melted ground wire on the back of the head. That didn't make it start but it helped further our testing. We then went and replaced the inj. pump due to the lack of fuel at the injectors. It took a while, but...
1998 Chevrolet Venture 3.4L No Start VIN: 1GNDU06E7W
check all wires and plugs all ok found bad pcm customer didnt buy towed out Trouble codes: P1671.
2002 Chevrolet Suburban 2500 LT 6.0L No Start, Stall, Misfire, MIL Lamp on VIN: 3GNGK26U62
Thanks to all who replied to our headache.Richard from New Hampshire nailed it.We found the 04-08-49-018E TSB, within the TSB there are resistance charts for the fuel level sensors.Upon inspection I found the rear tank level senser was reading inaccurate,about... Trouble codes: P0300.
2002 Chevrolet Silverado 3500 6.6L fuel leak VIN: 1GCJC33112
it was in fact the high preasure pump leaking. i verified it ,got my 2 hours, zipped it back up and sent it to good ol GM under their 100,000 mile warranty. thanks for the quick replys gents and have a good day.
2000 GMC Sierra 1500 SL 5.3L Cuts out, Stall VIN: 1GTEK19TXY
First of all Thank you for your replies. the customer neglected to tell me that the truck was stolen previously and in his words 'only a small amount of smoke from the column'wich had given multiple wiring problems. the steering column has now been repaired.Th...
1992 Pontiac Grand Am SE 3.3L No Start, Cuts out, Stall VIN: 1G2NE14N4N
Well it is finally fixed, I got a lot of good suggestions but none were the answer, the problem ended up being the 3/6 coil. I rechecked everything and then found that the vehicle suddenly had good spark on the 3/6 coil but weak spark on the rest, moved that c...
1993 Pontiac Bonneville SE 3.8L Cuts out, Stall VIN: 1G2HX53L7P
Hi Techs,alot of the help ideas was about the IAC,so I decided to clean it and drove the car,it did not stall,I thought I found the problem so I installed a new IAC and cleaned the injectors then drove the car,well the engine would stall almost every time I sl...
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